//乘积为正数的最长子数组长度
//测试链接：https://leetcode.cn/problems/maximum-length-of-subarray-with-positive-product/description/
public class GetMaxLen {
    public int getMaxLen(int[] nums) {
        int n = nums.length;
        int[] f = new int[n + 1];
        int[] g = new int[n + 1];
        int ret = Integer.MIN_VALUE;
        for (int i = 1; i <= n; i++) {
            if (nums[i - 1] > 0) {
                f[i] = f[i - 1] + 1;
                g[i] = g[i - 1] == 0 ? 0 : g[i - 1] + 1;
            } else if (nums[i - 1] < 0) {
                f[i] = g[i - 1] == 0 ? 0 : g[i - 1] + 1;
                g[i] = f[i - 1] + 1;
            }
            ret = Math.max(ret, f[i]);
        }
        return ret;
    }
}
